vierlingt



F. l. VIERLINE.

PENCIL.

APPLICATION HLED MA.6.1919.

Patented Out. 7,1919.

FRANK J. VIEELING, 0F MINNEAPOLIS, MINNESOTA.

rENcIr.

Specication ot Letters Patent.

Patented Oct. 7, 1919.,

Application filed March 1919. Serial No. 280,922.

To all whom t may concern:

Be it known that I, FRANK J. VIERLING, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota., have invented certain new and useful Improvements in Pencils; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has-for its object to provide an improved pencil; and, to this end, it consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.Y A

Referring to the drawings Figure 1 is a view in ele. ation o'f the improved pencil;

Fig, 2 is a view partly in a longitudinal section taken centrally through one form of the improved pencil and partly in elevation, on au enlarged scale;

. F1g. 3 is a view in transverse Vsection taken on the line 3 3 of Fig. 2;

Fig. 4 is a detail view in transverse section teken on the line 4 4 of Fig. 2;

Fig. 5 is a fragmentary view partly in longitudinal -'central section and partly in elevation illstratin another method of securing the lead to t ecfeeding device;

Fig. 6 is a view in elevation-of the lead securing device shown in Fig. 5 removed from the pencil;

Fi 7 is a view corresponding to Fig. 2, but illustrating another forni of the improved pencil.

The numeral 8 indicates a tubular outer casing having a. contracted lower end, or point 9. A guide block 10 and a sleeve 12 are pressed lno the casing 8 and rigidly held, the former, at Vsulostentially the longitudinal center of said casing, and the latter at the top thereof. The guide block 10 has en irregular axial opening 11 with curved ends and parallel flat sides and the sleeve 12 has internal screw threads. Owing to the required diameter of the sleeve 12, it is necessarytocircumferentially expand the casing 8 to receive the same.

A Acasing extension 13, of the same diemefer as the expanded upper end of the casing 8 is provided with a reduced lower end having external screw threads adapting the same to be screwed into the sleeve 12 to detachabl connect said extension to the casing 8. T e lower or inner end of the casing extension 13 also affords a shoulder 14,- for a purpose that will presently appear.

Mounted in the casing 8 1s a long feedsleeve 15, which rests on the guide block 10 and is of such length as to project through the vupper end of the casing extension 13. That portion of the sleeve 15 within the casing extension and projecting thereabove is circumferentiell'v reduced to afford a shoulder 16 underlying the shoulder 14. Obviously the guide block 10 and shoulder 14 hold the sleeve 15 against endwise movement but with freedom for turning movement within the casi 8. Within the sleeve l5 is a. feed-head 1 having, preferably, left hand screw threaded engagement with coarse internal screw threads 18 in the sleeve 13 and which screw threads extend from the lower end of said sleeve to the shoulder 16 thereof. Rigldly secured to the feed-head 17 is a feed-stem 19, the upper section of which is of the same` form in cross section as the opening 11 in the guide block 10 in which it works withfreedom for endwise movement, but is held thereby against turnin movement. The lower seotion of the feed-stem 19 is, as shown, round in cross section and 'formed in its lower end is a lead holdin 'seat 2O iirwhich is removably secured, allead 21.

To rotate the sleeve 15 and thereby impert a; traveling movement to the feed-head 17 therein, there is pressed onto the upwardly projectin end of said sleeve, a inger piece in the orm of a ca 22. The end of the sleeve 15 which exten s into the cap 22 is longitudinally split to permit the same to yield when said *cap` is forced thereon and thereby frictionally hold the seme, By turning the cap 22 with' respect to the casing 8, a like movement is' imparted to the Sleeve 15 to operate a long nut on the feedhead 17 and impart an endwise movement to the feed-stem 19 and lea/d 21, and which lead extends through the open end of the casing point9.

Amew lead is preferably attached to the feed-stem 19 by removing said stem from the casing 8 and inserting the lead into `the seat 20 and then replacmg the feed-stem. To remove thefeedstem v1.9 from the casing los the rap Q2 first removed from the .sleeve 1.3 and then the easing extension 1? is uuscrcwod from said casing. with the cap and casing extension l?! reuroved the sleeve l5 may he lilled from (he casing H which carries with il the feed-head 1T, feed-stem lfl and atlarhcd lead 21. l'lxl'l'a leads may Ialu-pt in the upper cud of the easing 15 and in which frase they will he supported on the Feed-head 17 and move therewith,

Referring now to the construction illustrated in Figs. 5 and (i which shows a different method of attachinr a lead to the feed-stem whereby substantially all of the lead may be fed throu h the opening in the easing point 9 to avoit Waste. This lead holding member has a tapered lower end or point which permits the same to be fed into the extreme lower end of the casin point 9. The lower end portion of the leagholding member 23 is provided with an axial bore affording a scat for a lead and it is also longitudinally split to yield and frietlonally hold the lead. The lead holding member 23, above its lead seat, is recessed at 24. to receive the lower end portion of the feed-stem 19. .Formed ou the feed-stem 19, above the lower end there-of, but within the recess 24, is a shoulder 25. The upper end of the lead holding memb r 23 is closed by a plug 26 having an axil opening for the feed-stem 1 9, and which plug affords a stop for the shoulder 25 and thereby connects the lead holding member 23 to the said stem 19 with vfreedom for limited endwise movement.

Normally, the lead holding member 23 is suspended from theshoulder 25 on the feedstem 19 with the upper end of the lead 21 in engagement with the lower end of said feedsten'i and which feeddstem provides a positive feed for the lead. Under the feeding' action of the feed-.stem 19, produced by turning the cap Q2 to the right, the lead holding member is caused to travel toward the lower end of the casingpoint. 9. When the lead holding member 23 cornes in contact with the side wallsof the casing point 9, sad walls become a fixed base of resistance for said member. Under further endnjise movement of the feed-Stein 19, the, leaid 21 will be moved endwise from thelead holding member 23, thus makingit ossihle to use substantially all of the leaf. It will be noted that the sides of the lead holding member 23 are flattened so as to permit the seme to be inserted through the guide block 10.

Referring to theconstruction shown in Fig. 7, it will be noted that in place of the guide block 10,11 feed-nut 27 is rigidly secured to the casing 8 and in which nut is mounted a feed-screw 28. 'The feed-stem 19 in this construction is round in cross section throughout its entire length.` Integrally formed with the upper end lof the feed-screw 28 is a guide stem 29 of the same form, in

cross section, as the upper portion ot the feed-stem 19 in Fig. 2. lhis guide-stem 2!) is mounted iu a guide block ill). with freedom for cudwise morena-ut lult is held thereby against turning movement. The guide bloc-lf il() is presi-.ed into the central portion of' the, sleeve 1.3 and securely held iu a fixed posi-- tion )n the upper cud oll fluguide-sleur' 2) is a slop plug' 'll arranged to engage (he guide block 30. when the z-:lceve l5 is removed from the casing.,r H. and therebyr carii' with it, the feed errew 28 and parts carried thereby. Extra leads may be carried in the upper end or the sleeve 15 and supported ou the guide. block 30. In actual construction the screw' 28 ma).r be located lower in the casiu,glr 8 so that the guide stem 9.9 will he entirely out of the contracted upper end of the sleeve 15.

What I claim is:-w

1. A pencil comprising a easing having a fixed guide block, a easing extension detachably secured to said easing, a lead feedinar member rotativclv mounted in the. casiupr and its extension, said lucuiber being held against. endwise movement by the casing extension and the ,guide block, a lead feeding stem working through the guide block with freedom for endwise movement but held thereby against turning movement, and means including screw-threads for imparting endwise n'iovement to said stem under the rotary movement of said member. 2. A pencil comprisingr a casing,lr having a fixed guide block, a casing extension having screw-threaded engagen'ient with the casing, a lead feeding member rotativeljf mounted in the casing' and its extension, saidl member being held against endwise movement by the easing extension and guide block1 a lead feeding stem Workinf.,lr through the guide block with freedom for endxvise movement but held thereby against turning movement, and means including screw-tlu'eads for imparting endwise movement to said stem under the rotary movement of said member. 3. A pencil oomprisiupy a easing havinga fixed guide block, a easing extension haeing screw-threaded engagement with thecasingz. a sleeve rotalively mounted in the casing and its extension, said sleeve being held 'against endwise Amow-,ment by the casingr extension and guide block, a head mounted iin the sleeve and having screw-threaded engagement therewith, a Vlead holding stein 'secured to the head and working through tl yguide block with freedom'for endwjse m. vement but held thereby against turning movement,

and a cap for thecasing extension-and havcluding said guide block for holding the lead feed' g member against endwise movement, and aV lead feedmg stem having screwthreaded en Yagement with the lead feeding member en Working in said guide block with freedom -fol' endwse movement but held thereby ageinell rotation.

5. A pencil comprisn a. casing having afxed guide block, e` tu 111erY lead feedmgy member rotativelymounted in the casing, 1

means including said guide block for ho ing the lead feeding membe against endwise movement, and a, lead feeding stem workng in the guide block with freedom for d enflwse movement but held thereby e einst rotation and provided at its up er en with a head extending into the lead eeding member and havin screw-threaded engagement therewith enig lead feedin stem also havin on its lower end lead ho dngmeans.

n testimony whex'eof I aix my signature in presence of n. wtgiees.'

Y FRANK 3. VERLING. lvitness:

HARRYD. Knoms. 

